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Betekhtina, O. A. (1969). Vestfal'skiye nemorskiye dvustvorchatyye mollyuski uglenosnykh otlozheniy Kuzbassa [Westphalian non-marine bivalve molluscs of coal-bearing deposits of Kuzbass]. In: Verkhniy paleozoy Sibiri i Dal'nego [Upper Paleozoic of Siberia and the Far East]. Trudy Instituta geologii i geofiziki SO AN SSSR. 68: 80-101.
Betekhtina, O. A. (1969). Vestfal'skiye nemorskiye dvustvorchatyye mollyuski uglenosnykh otlozheniy Kuzbassa [Westphalian non-marine bivalve molluscs of coal-bearing deposits of Kuzbass]. In: Verkhniy paleozoy Sibiri i Dal'nego [Upper Paleozoic of Siberia and the Far East]. Trudy Instituta geologii i geofiziki SO AN SSSR. 68: 80-101.
